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CBSE Guess > Papers > Question Papers > Class XII > 2005 > Chemistry > Outside Delhi Set-III

CHEMISTRY 2005 (Set-III Outside Delhi)

Except for the following questions, all the remaining questions have bees asked In Set I. and Set II.

Q. 6. Complete the following chemical equations: 2

(i) R2 SiCI2 + H2O –>

(ii) NaCIO3 (aq) + SO2 (g) –>

Q. 10. What are biodegradable polymers? Write the structural formula of a bio-degradable polymer. 2

Q. 13. Stating the necessary reaction conditions write chemical reaction equations to obtain the following: 3

(i) Chlorobenzene from aniline

(ii) 2-bromo-4-methyl aniline from p-toluidine

(iii) Ethylamine from acetaldehyde

Q. 18. (a) Write chemical equations to illustrate each of the following reactions:

(i) Acylation reaction

(ii) Rosenmund reduction

(b) Write the IUPAC name of the following compound: 3

                              O

                              ||

CH3 CH(Br)CH2 C-NHCH3      

Q. 23. What is a propellant? How are various rocket propellants classified? Give one example of each class. 3

Q. 25. (a) Answer the following queries about proteins:

(i) How are proteins related to amino acids?

(ii) How are oligopeptides different from polypeptides?

(iii) When is a protein said to be denatured?

(b) What are hormones? Give an example. Why are hormones called chemical messengers? 5

Or

 (a) Define and classify vitamins. Give at least two examples of each type.

(b) Define enzymes and comment on the specificity in action of an enzy Illustrate with an example.

English 2005 Question Papers Class XII